WO2011128118A1 - Machine de soudage par ultrasons de type omega - Google Patents

Machine de soudage par ultrasons de type omega Download PDF

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Publication number
WO2011128118A1
WO2011128118A1 PCT/EP2011/001976 EP2011001976W WO2011128118A1 WO 2011128118 A1 WO2011128118 A1 WO 2011128118A1 EP 2011001976 W EP2011001976 W EP 2011001976W WO 2011128118 A1 WO2011128118 A1 WO 2011128118A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultrasonic welding
sonotrode
omega
sheet
welding machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2011/001976
Other languages
German (de)
English (en)
Other versions
WO2011128118A8 (fr
Inventor
Helge Steckmann
Irina Karpel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ULTRASONICS STECKMANN GmbH
Original Assignee
ULTRASONICS STECKMANN GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ULTRASONICS STECKMANN GmbH filed Critical ULTRASONICS STECKMANN GmbH
Publication of WO2011128118A1 publication Critical patent/WO2011128118A1/fr
Anticipated expiration legal-status Critical
Publication of WO2011128118A8 publication Critical patent/WO2011128118A8/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • B23K20/103—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding using a roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers

Definitions

  • the invention relates to an omega ultrasonic welding machine for welding a number of metallic workpieces.
  • An ultrasonic welding machine is typically used to perform ultrasonic welding. It is used, for example, to weld electrical conductors after completion of the welding preparatory compacting, as known from DE 37 19083 C1 or WO 95/10866.
  • a contact force which is applied via a sonotrode, which rests on one side of the contact surface to be formed, and at the same time the action of high-frequency vibrations , which usually have a frequency of 20 kHz exposed, so that the two workpieces are rubbed against each other at their contact boundary with high shear force.
  • the mode of operation of an ultrasonic welding machine provides that the oxide layers and impurities on the affected metal surfaces are destroyed by the high-frequency shearing force between the metal parts to be joined during welding by sonotrode, crushed and thrown from the joint surface or at least transported to the edge. This creates a dense contact of pure metals, between the surface of a cooperation is possible, which need not be identical metals, but also different metals can be connected together.
  • BESTATiGUNGSKOPIE The combination of three factors, including static contact force, oscillating shear force and moderate temperature rise in the contact area, creates the intended firm and permanent connection. Basically, the following bonding mechanisms are provided at the contact boundary of the metals to each other:
  • a metallic compound through the interaction of electron structures deformed on the metal surface. Prerequisites are a pure metal surface and a close contact of the workpieces to be welded together.
  • the heat production in small metal parts is connected with the dissipation of the vibration energy in the volume of the metal part by plastic shear deformation.
  • the shear strain transferred from the vibrating sonotrode to the surface of the metal is considered to be the ratio of the vibration amplitude to the sample thickness. This deformation is thus above the elastic limit.
  • the shearing deformation in the metal increases with vertical action to 195%. This deformation is far in the plastic range, wherein the shear direction changes at the frequency of 20 kHz.
  • the stress-strain curve diagram of such plastic deformation represents a hysteresis loop, the surface of which reflects the energy dissipated primarily as heat.
  • the ultrasonic welding process has some advantages over other, previously common, methods. This includes:
  • the welding time is short, full automation of the welding process and integration into other manufacturing processes and manufacturing facilities is easily possible,
  • the mechanical vibrations of a sonotrode are introduced on the upper, the sonotrode facing side of the metal parts to be joined in the horizontal axis, wherein the sonotrode is lowered with a predetermined force, for example, generated by a pneumatic force on the surface of the upper part. This force is maintained constant during the ultrasonic welding process.
  • the pieces of metal to be processed are not necessarily made of the same material and, due to other external conditions, do not necessarily provide the optimum conditions for a fast and durable connection by the ultrasonic welding process.
  • the plastic deformation of metal parts to be joined in the ultrasonic welding process is the most important component of said connection mechanism.
  • the degree of deformation depends both on the adjustable ultrasonic parameters, such as the power supplied by the generator, the vibration amplitude and the exposure time, as well as the profile of the tool surfaces and the material properties of the workpieces to be joined.
  • the invention is therefore based on the object to provide an omega ultrasonic welding machine that connects a solar collector with an absorber plate and a liquid-conducting in the application piping system by an ultrasonic welding process such that the effective surface of the solar collector is not deformed, destroyed or otherwise impaired and a high heat transfer between the components is achieved.
  • This object is achieved according to the invention by providing at least one further sonotrode on a track parallel to the track of the first sonotrode.
  • the invention is based on the consideration that a suitable heat transfer between the solar radiation receiving and converting absorber plate and the liquid-transporting piping system can be achieved by the formation of the pipe surrounding, firmly connected to the absorber sheet metal and this effect in a particularly effective execution an additional weld seam which inseparably connects the pipe system to the metal sheet can be ensured and / or reinforced.
  • the sonotrodes are advantageously designed for a back-side welding of any metallic workpiece to the absorber plate.
  • a device which adapts the sheet to the pipe before the ultrasonic welding operation or, in a particularly advantageous embodiment, the sheet is already made in a prior to application to the respective pipe section, for example ⁇ -shaped Forming for welding with the absorber sheet applied to the pipe.
  • a pressure roller is provided, which before carrying out the ultrasonic welding process for welding the ⁇ -shaped sheet passes through the section to be welded with the absorber sheet and presses the ⁇ -shaped sheet to the pipe.
  • the metallic workpiece is advantageously welded to at least one line of contact between the metallic workpiece and the piping system with this, with a further sonotrode is provided for this purpose.
  • the advantages achieved by the invention are in particular that a back-side welding of the absorber plate to the liquid-carrying piping system and thereby the preservation of the effective and optically unaffected surface of the absorber plate while maintaining the entire tube cross-section and the maintenance or even increase of the heat transfer surface between the absorber plate and the piping system is made possible, wherein in particular in a ⁇ -shaped plate at least three heat transfer between the pipe and the sheet are provided and wherein in a particularly advantageous embodiment, at least one of the heat transfer based on a weld lies.
  • FIG. 1 a solar collector in essential, schematic representation in section
  • FIG. FIG. 2 shows a sectional view of a solar collector with a deformed pipeline in an essential, schematic representation
  • FIG. 3 a sonotrode in lateral view
  • FIG. 4 an omega ultrasonic welding machine with two sonotrodes in frontal
  • FIG. 5 is an enlarged detail of the ultrasonic welding work area in frontal view
  • FIG. 6 the two sonotrodes with the workpieces to be welded in
  • FIG. 7 an additional, parallel to the two in FIG. 6 sonotrodes, provided sonotrode for welding the metallic workpiece with the pipeline in frontal, three-dimensional representation.
  • FIG. 1 shows, in a representative, schematic section, the essential components of a solar collector in section, in the conventional manner will be produced.
  • the absorber plate 2 rests on the tube 4.
  • the sonotrode is subject to high-frequency oscillations with a self-resonance of the sonotrode at a frequency of 20 kHz, which lead to a contraction and extraction of the highly elastic steel from which the sonotrode is made, with an amplitude of about 30 to 40 ⁇ of the sonotrode, so that the absorber sheet 2 and the tube 4 are rubbed against one another at their contact boundary 6, ie in the region in which they are in contact with each other, with great shear force.
  • This area is determined by the longitudinal axis of the tube 4, at the highest point closest to the absorber plate 2, the sonotrode is guided along during the welding process. Through this process, the two workpieces are permanently connected.
  • FIG. 2 shows a way to circumvent the disadvantages of manufacturing according to conventional design, including the surface degradation:
  • the tube 4 rests on the absorber plate 2 after the tube jacket 4, as shown in FIG. 2, through which the correspondingly required application of force and deformation has undergone a cross-sectional change process.
  • the result is a contact surface 6 in the pipe itself between the pipe jacket and the radially opposite Be rich of the tubular jacket, which welded via a first weld by the sonotrode, the upper contact surface of the tube 4 with the radially opposite.
  • the original, to be deformed tube 4 is to choose a larger cross-section than that in FIG. 1, used in conventional manufacturing, left in the original form with a circular cross-section tube 4th
  • the tube 4 as shown in FIG. 2 is shown, deformed and welded, it can be used for the production of the solar collector.
  • the sonotrode sets in the recess of the tube 4 between the individual channels on the contact surface 6 to the absorber plate 2 and welded to the tube 4 with the absorber sheet second
  • FIG. 3 shows the cause of the surface destruction, namely a sonotrode 8, which has a circular end face with a peripheral contact area 10 for the workpiece, which applies the force to the workpieces.
  • This spur gear is provided on the contact surface 10 with a circumferential corrugation.
  • This corrugation is necessary to form a positive connection to the workpiece, the absorber sheet 2 as shown in FIG. 1 or the tube 4 in FIG. 2, build up and move the workpiece by the toothing in a sideways movement and vibrationally dependent, whereby the said high-frequency shearing force is generated.
  • the mechanical vibrations of the sonotrode 8 are introduced to the sonotrode 8 facing the metal parts to be joined in the horizontal axis, wherein the sonotrode 8 is lowered onto the surface of the upper part with a pneumatically generated force in its direction indicated by an arrow, which is approximately thirty kp. This force is maintained constant during the ultrasonic welding process.
  • the execution of the corrugation is dependent on the intended application and can be provided accordingly suitable. At the welding and contact point 6, it ensures destruction of the surface coating which has been completely preserved before welding.
  • FIG. 4 shows the omega ultrasonic welding machine 1 with two sonotrodes 8a, 8b in a frontal view.
  • a control system 12a, 12b which is not shown here in detail, with the generator responsible for the power supply and the respective resonance system 14a, 14b oscillating the sonotrodes 8a, 8b.
  • the sonotrodes 8a, 8b are guided by the control system 12 in its path over the sheet or metallic workpiece 16 and welded to the absorber sheet 2 at the contact point 6a, 6b.
  • FIG. 5 is the ultrasonic working range of the omega ultrasonic welding machine 1 in a comparison with FIG. 4 enlarged section shown.
  • the sheet 16, which ensures the connection of the tube 4 with the absorber sheet 2 and the required heat transfer, is applied by a suitable, not shown apparatus before the ultrasonic welding process to the pipe 4 or by a made prior to the ⁇ -shaped formation placed around the pipe. Subsequently, on two parallel paths through the sonotrodes 8a, 8b, the ultrasonic welding of the sheet 16 with the absorber sheet 2 at the contact points 6a, 6b. It is conceivable that the sonotrodes 8a, 8b carry out the ultrasonic welding process, both in time and in parallel, with a time offset.
  • FIG. 6 shows the two sonotrodes 8a, 8b with the workpieces to be welded, the plate 16 above the tube 4 and the absorber plate 2 in a frontal, three-dimensional view.
  • the sonotrodes 8a, 8b are adjusted in their distance from each other so that they parallel during the ultrasonic welding process, as close as possible on the pipe 4 fitting raceways. As a result, the sheet 16 rests against the pipe 4 and ensures the greatest possible heat transfer between the pipe 4 and the absorber plate 2 of the solar collector.
  • a particularly large heat transfer factor allows the ⁇ -shaped cross-section of the sheet 16, since this formation at least three heat transfer between the ⁇ -shaped plate 16 and the pipe 4 generates even with unfavorable expansion of the metal workpiece 16 instead of only one heat transfer in the in the prior art provided standard welding.
  • a pressure roller 22 is provided, which the FIG. 7 shows. This pressure roller 22 is formed such that it images in negative form the pipe 4 with the subsequent ⁇ -shaped plate 16.
  • the use of the pressure roller 22 takes place before the ultrasonic welding process, which welds the ⁇ -shaped plate 16 to the absorber plate 2.
  • the pressure roller 22 passes through the area to be welded and presses the ⁇ -shaped plate 16 against the pipe 4 and to the absorber sheet 2.
  • the further advantage of the ⁇ -shaped cross-section of the sheet 16 is that it makes it possible to place almost any tube materials suitable for liquid transport under the sheet 16.
  • pipes of aluminum, copper or iron may be used; even the use of plastic pipes is conceivable taking into account the necessary heat transfer from the sheathing metal sheet 16 to the piping system 4.
  • a particular advantage of the ⁇ -shaped metal sheet 16 is that the bimetal effect which otherwise otherwise inevitably results in welding of, for example, aluminum sheets with copper pipes, is avoided because under the ⁇ -fiber. Migen sheet 16 different expansion coefficients of the pipe 4 can be compensated.
  • the back-side welding of the sheet 16 with the rear side of the absorber sheet 2 facing the solar radiation by the sonotrodes 8a, 8b leaves the surface of the absorber sheet 2 in its effective and optically homogeneous surface structure unimpaired as the underside of the workpiece 2 during the ultrasonic welding process.
  • FIG. 8 shows a variant of the omega ultrasonic welding machine for increasing and / or ensuring the effective heat transfer between the ⁇ -shaped sheet metal 16 to be welded to the absorber sheet 2 and the piping system 4: at least one parallel to the raceways of the metallic workpiece 16 with the absorber sheet 2

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

L'invention concerne une machine de soudage par ultrasons (1) de type OMEGA qui sert à souder un certain nombre de pièces métalliques (16). Selon l'invention, cette machine permet de connecter, au moyen d'une opération de soudage par ultrasons, un collecteur solaire à une tôle absorbante (2) et à un système (4) de conduites tubulaires qui en cours d'utilisation transporte un liquide. Cette connexion doit être effectuée de telle sorte que la surface active du collecteur solaire ne soit ni déformée, ni détériorée, ni autrement altérée. Pour ce faire, en plus d'une première sonotrode (8a), au moins une autre sonotrode (8b) est située sur une voie de roulement s'étendant parallèlement à la voie de roulement de la première sonotrode (8a).
PCT/EP2011/001976 2010-04-16 2011-04-19 Machine de soudage par ultrasons de type omega Ceased WO2011128118A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202010005770U DE202010005770U1 (de) 2010-04-16 2010-04-16 Ultraschall-Schweißmaschine
DE202010005770.1 2010-04-16

Publications (2)

Publication Number Publication Date
WO2011128118A1 true WO2011128118A1 (fr) 2011-10-20
WO2011128118A8 WO2011128118A8 (fr) 2013-07-11

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PCT/EP2011/001976 Ceased WO2011128118A1 (fr) 2010-04-16 2011-04-19 Machine de soudage par ultrasons de type omega

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DE (1) DE202010005770U1 (fr)
WO (1) WO2011128118A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2762787A2 (fr) 2013-01-31 2014-08-06 Barcol-Air AG Élément climatique pour un plafond chauffant et refroidissant
DE202015103786U1 (de) 2015-07-17 2015-09-10 Almeco Gmbh Deckenelement, insbesondere Heiz- und Kühldeckenelement, auf Basis von Aluminium oder Stahl
EP3118533A1 (fr) 2015-07-17 2017-01-18 Almeco GmbH Élement de plafond, en particulier element de plafond de chauffage ou de refroidissement, a base d'aluminium ou d'acier
EP3022006B1 (fr) * 2013-07-18 2020-09-23 Robert Bosch GmbH Sonotrode, procédé de fabrication de soudures par ultrasons utilisant une telle sonotrode, dispositif de soudage pour mise en oeuvre du procédé comprenant une telle sonotrode

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH707507B1 (de) * 2013-01-31 2016-05-31 Barcol-Air Ag Klimaelement für eine Heiz- und Kühldecke.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719083C1 (en) 1987-06-06 1988-09-01 Stapla Ultraschalltechnik Gmbh Method for the connection of electrical conductors, and a device for carrying out the method
WO1995010866A1 (fr) 1993-10-14 1995-04-20 Schunk Ultraschalltechnik Gmbh Procede et dispositif pour le compactage et le soudage subsequent de conducteurs electriques
EP0872301A1 (fr) * 1997-04-17 1998-10-21 Mitsui Mining & Smelting Co., Ltd. Soudage par ultrason de feuille de cuivre
EP1371441A1 (fr) * 2002-06-14 2003-12-17 Buderus Heiztechnik GmbH Procédé de soudage par ultrasons des pieces métalliques
JP2004148373A (ja) * 2002-10-31 2004-05-27 Mitsui Mining & Smelting Co Ltd 金属箔用の超音波溶接装置
DE202007008706U1 (de) 2007-06-19 2007-09-13 Ultrasonics Steckmann Gmbh Ultraschall-Schweißstation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719083C1 (en) 1987-06-06 1988-09-01 Stapla Ultraschalltechnik Gmbh Method for the connection of electrical conductors, and a device for carrying out the method
WO1995010866A1 (fr) 1993-10-14 1995-04-20 Schunk Ultraschalltechnik Gmbh Procede et dispositif pour le compactage et le soudage subsequent de conducteurs electriques
EP0872301A1 (fr) * 1997-04-17 1998-10-21 Mitsui Mining & Smelting Co., Ltd. Soudage par ultrason de feuille de cuivre
EP1371441A1 (fr) * 2002-06-14 2003-12-17 Buderus Heiztechnik GmbH Procédé de soudage par ultrasons des pieces métalliques
JP2004148373A (ja) * 2002-10-31 2004-05-27 Mitsui Mining & Smelting Co Ltd 金属箔用の超音波溶接装置
DE202007008706U1 (de) 2007-06-19 2007-09-13 Ultrasonics Steckmann Gmbh Ultraschall-Schweißstation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2762787A2 (fr) 2013-01-31 2014-08-06 Barcol-Air AG Élément climatique pour un plafond chauffant et refroidissant
EP3022006B1 (fr) * 2013-07-18 2020-09-23 Robert Bosch GmbH Sonotrode, procédé de fabrication de soudures par ultrasons utilisant une telle sonotrode, dispositif de soudage pour mise en oeuvre du procédé comprenant une telle sonotrode
DE202015103786U1 (de) 2015-07-17 2015-09-10 Almeco Gmbh Deckenelement, insbesondere Heiz- und Kühldeckenelement, auf Basis von Aluminium oder Stahl
EP3118533A1 (fr) 2015-07-17 2017-01-18 Almeco GmbH Élement de plafond, en particulier element de plafond de chauffage ou de refroidissement, a base d'aluminium ou d'acier

Also Published As

Publication number Publication date
DE202010005770U1 (de) 2010-09-02
WO2011128118A8 (fr) 2013-07-11

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